#include <stdio.h>
using namespace std;

#define Nmax 100005

int n, a[Nmax], best[Nmax], poz[Nmax], maxim, maxpoz;

void citire(){
    scanf("%i", &n);
    for(int i = 1; i <= n; ++i)
        scanf("%i", &a[i]);
    fclose(stdin);
}

void rezolva(){
    for(int i = n; i >= 1; --i){
        best[i]  = 1;
        poz[i] = -1;
        for(int j = n; j > i; --j){
            if(a[j] > a[i] && best[i] < best[j] + 1){
                best[i] = best[j] + 1;
                poz[i] = j;
                if(best[i] > maxim) maxim = best[i], maxpoz = i;
            }
        }
    }
}

int main(){
    freopen("scmax.in", "r", stdin);
    freopen("scmax.out", "w", stdout);

    citire();
    rezolva();

    printf("%i\n", maxim);
    while(maxpoz != -1){
        printf("%i ", a[maxpoz]);
        maxpoz = poz[maxpoz];
    }
    printf("\n");
    fclose(stdout);

    return 0;
}